Examples of org.apache.http.conn.routing.RouteTracker

org.apache.http.conn.routing.RouteTracker
Helps tracking the steps in establishing a route. @author Roland Weber @version $Revision: 620254 $ @since 4.0

    }


    public synchronized void tunnelTarget(
            final HttpParams params) throws IOException {
        final HttpPoolEntry entry = ensurePoolEntry();
        final RouteTracker tracker = entry.getTracker();
        if (!tracker.isConnected()) {
            throw new IllegalStateException("Connection not open");
        }
        if (tracker.isTunnelled()) {
            throw new IllegalStateException("Connection is already tunnelled");
        }
        tracker.tunnelTarget(false);
    }

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    }


    public synchronized void layerProtocol(
            final HttpContext context, final HttpParams params) throws IOException {
        final HttpPoolEntry entry = ensurePoolEntry();
        final RouteTracker tracker = entry.getTracker();
        if (!tracker.isConnected()) {
            throw new IllegalStateException("Connection not open");
        }
        if (!tracker.isTunnelled()) {
            throw new IllegalStateException("Protocol layering without a tunnel not supported");
        }
        if (tracker.isLayered()) {
            throw new IllegalStateException("Multiple protocol layering not supported");
        }
        final HttpHost target = tracker.getTargetHost();
        final AsyncScheme scheme = getSchemeRegistry(context).getScheme(target);
        final LayeringStrategy layeringStrategy = scheme.getLayeringStrategy();
        if (layeringStrategy == null) {
            throw new IllegalStateException(scheme.getName() +
                    " scheme does not provider support for protocol layering");
        }
        final IOSession iosession = entry.getConnection();
        final ClientAsyncConnection conn = (ClientAsyncConnection) iosession.getAttribute(
                IOEventDispatch.CONNECTION_KEY);
        conn.upgrade((SSLIOSession) layeringStrategy.layer(iosession));
        tracker.layerProtocol(layeringStrategy.isSecure());
    }

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    HttpPoolEntry(final Log log, final String id, final HttpRoute route, final IOSession session,
            final long timeToLive, final TimeUnit tunit) {
        super(id, route, session, timeToLive, tunit);
        this.log = log;
        this.tracker = new RouteTracker(route);
    }

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        final NHttpClientConnection managedConn = connManager.getConnection();
        if (!state.isRouteEstablished() && state.getRouteTracker() == null) {
            state.setRouteEstablished(this.connmgr.isRouteComplete(managedConn));
            if (!state.isRouteEstablished()) {
                this.log.debug("Start connection routing");
                state.setRouteTracker(new RouteTracker(route));
            } else {
                this.log.debug("Connection route already established");
            }
        }


        if (!state.isRouteEstablished()) {
            final RouteTracker routeTracker = state.getRouteTracker();
            int step;
            loop:
            do {
                final HttpRoute fact = routeTracker.toRoute();
                step = this.routeDirector.nextStep(route, fact);
                switch (step) {
                case HttpRouteDirector.CONNECT_TARGET:
                    this.connmgr.startRoute(managedConn, route, localContext);
                    routeTracker.connectTarget(route.isSecure());
                    break;
                case HttpRouteDirector.CONNECT_PROXY:
                    this.connmgr.startRoute(managedConn, route, localContext);
                    final HttpHost proxy  = route.getProxyHost();
                    routeTracker.connectProxy(proxy, false);
                    break;
                case HttpRouteDirector.TUNNEL_TARGET:
                    if (this.log.isDebugEnabled()) {
                        this.log.debug("[exchange: " + state.getId() + "] Tunnel required");
                    }
                    final HttpRequest connect = createConnectRequest(route, state);
                    state.setCurrentRequest(HttpRequestWrapper.wrap(connect));
                    break loop;
                case HttpRouteDirector.TUNNEL_PROXY:
                    throw new HttpException("Proxy chains are not supported");
                case HttpRouteDirector.LAYER_PROTOCOL:
                    this.connmgr.upgrade(managedConn, route, localContext);
                    routeTracker.layerProtocol(route.isSecure());
                    break;
                case HttpRouteDirector.UNREACHABLE:
                    throw new HttpException("Unable to establish route: " +
                            "planned = " + route + "; current = " + fact);
                case HttpRouteDirector.COMPLETE:

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            if (status < 200) {
                throw new HttpException("Unexpected response to CONNECT request: " +
                        response.getStatusLine());
            }
            if (status == HttpStatus.SC_OK) {
                final RouteTracker routeTracker = state.getRouteTracker();
                routeTracker.tunnelTarget(false);
                state.setCurrentRequest(null);
            } else {
                if (!handleConnectResponse(state)) {
                    state.setFinalResponse(response);
                }

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            // Kill the connection if it expired.
            closeExpiredConnections();


            if (uniquePoolEntry.connection.isOpen()) {
                final RouteTracker tracker = uniquePoolEntry.tracker;
                shutdown = (tracker == null || // can happen if method is aborted
                            !tracker.toRoute().equals(route));
            } else {
                // If the connection is not open, create a new PoolEntry,
                // as the connection may have been marked not reusable,
                // due to aborts -- and the PoolEntry should not be reused
                // either.  There's no harm in recreating an entry if

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        // - call the operator
        // - update the tracking data
        // In this order, we can be sure that only a successful
        // opening of the connection will be tracked.


        this.tracker = new RouteTracker(route);
        final HttpHost proxy  = route.getProxyHost();


        connOperator.openConnection
            (this.connection,
             (proxy != null) ? proxy : route.getTargetHost(),
             route.getLocalAddress(),
             context, params);


        final RouteTracker localTracker = tracker; // capture volatile


        // If this tracker was reset while connecting,
        // fail early.
        if (localTracker == null) {
            throw new InterruptedIOException("Request aborted");
        }


        if (proxy == null) {
            localTracker.connectTarget(this.connection.isSecure());
        } else {
            localTracker.connectProxy(proxy, this.connection.isSecure());
        }


    }

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        final OperatedClientConnection conn;
        synchronized (this) {
            if (this.poolEntry == null) {
                throw new ConnectionShutdownException();
            }
            final RouteTracker tracker = this.poolEntry.getTracker();
            Asserts.notNull(tracker, "Route tracker");
            Asserts.check(!tracker.isConnected(), "Connection already open");
            conn = this.poolEntry.getConnection();
        }


        final HttpHost proxy  = route.getProxyHost();
        this.operator.openConnection(
                conn,
                (proxy != null) ? proxy : route.getTargetHost(),
                route.getLocalAddress(),
                context, params);


        synchronized (this) {
            if (this.poolEntry == null) {
                throw new InterruptedIOException();
            }
            final RouteTracker tracker = this.poolEntry.getTracker();
            if (proxy == null) {
                tracker.connectTarget(conn.isSecure());
            } else {
                tracker.connectProxy(proxy, conn.isSecure());
            }
        }
    }

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        final OperatedClientConnection conn;
        synchronized (this) {
            if (this.poolEntry == null) {
                throw new ConnectionShutdownException();
            }
            final RouteTracker tracker = this.poolEntry.getTracker();
            Asserts.notNull(tracker, "Route tracker");
            Asserts.check(tracker.isConnected(), "Connection not open");
            Asserts.check(!tracker.isTunnelled(), "Connection is already tunnelled");
            target = tracker.getTargetHost();
            conn = this.poolEntry.getConnection();
        }


        conn.update(null, target, secure, params);


        synchronized (this) {
            if (this.poolEntry == null) {
                throw new InterruptedIOException();
            }
            final RouteTracker tracker = this.poolEntry.getTracker();
            tracker.tunnelTarget(secure);
        }
    }

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        final OperatedClientConnection conn;
        synchronized (this) {
            if (this.poolEntry == null) {
                throw new ConnectionShutdownException();
            }
            final RouteTracker tracker = this.poolEntry.getTracker();
            Asserts.notNull(tracker, "Route tracker");
            Asserts.check(tracker.isConnected(), "Connection not open");
            conn = this.poolEntry.getConnection();
        }


        conn.update(null, next, secure, params);


        synchronized (this) {
            if (this.poolEntry == null) {
                throw new InterruptedIOException();
            }
            final RouteTracker tracker = this.poolEntry.getTracker();
            tracker.tunnelProxy(next, secure);
        }
    }

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